dislocation

an imperfection in the atomic structure of a crystal, usually consisting of one or more missing or disordered atoms in the crystal lattice

dislocation

noun

The act or process of dislocating or the state of having been dislocated: “the severe emotional dislocation experienced by millions of immigrants &ellipsis; who were forced to separate themselves forever from the &ellipsis; circle of people and places on which they had depended”(Doris Kearns Goodwin).

Displacement of a body part, especially the temporary displacement of a bone from its normal position.

Chemistry An imperfection in the crystal structure of a metal or other solid resulting from an absence of an atom or atoms in one or more layers of a crystal.